Adobe Substance 3D Stager: Out-of-bounds write allows arbitrary code execution
Summary
Adobe Substance 3D Stager 3.1.8 and earlier on Windows and macOS contains an out-of-bounds write vulnerability. An attacker can craft a malicious file that, when a user opens it, may execute arbitrary code with the privileges of the current user. Exploitation requires that the victim opens the malicious file; no network exposure or authentication is needed.
Affected
- Adobe Substance 3D Stager 3.1.8 and earlier (Windows and macOS)
- Earliest affected version: Unknown.
Fixed in
- Adobe Substance 3D Stager 3.1.9 (Windows and macOS), per Adobe bulletin APSB26-170
Workaround
Unknown. No vendor workaround is documented.
- Until patched, do not open Stager project files or 3D files from unknown or untrusted senders.
Exploitation
- Adobe states it is not aware of any exploits in the wild for the issues addressed in this update.
- No public proof of concept is known at the time of writing.
- CISA SSVC assessment: exploitation none, not automatable, total technical impact.
Our recommendation
- Identify Stager installations, for example via the Creative Cloud inventory.
- Update to version 3.1.9 on Windows and macOS endpoints.
- Include the other fixes of bulletin APSB26-170 in the same rollout.
- Until patched, avoid opening project or 3D files from unknown or external senders.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Adobe Security Bulletin APSB26-170 www.adobe.com
- CVE record and CNA data (vulners) vulners.com
- CVE list entry (vulners) vulners.com
- Adobe Substance 3D Stager product page adobe.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 2 Nov 2026, 00:23.
Original description (NVD)
Substance3D - Stager is affected by an out-of-bounds write vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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